Tools for use in tightening or removing screw-threaded fasteners

Details Tools for use in tightening or removing screw-threaded fasteners Tools for use in tightening or removing screw-threaded fasteners

1985-06-17

1987-03-31

Schmidt, Frederick R.

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

81429, 81469, 81 5714, B25B 23157

Patent

active

046533583

ABSTRACT:
A device for rotating a screw into or out of a workpiece, the device being connectible to a power drill and including a screw driving member. There is provided between the power drill and the screw driving member a mechanism for determining the direction of rotation of the screw-driving member and a torque-adjusting mechanism for controlling the depth a screw is to be driven into a workpiece and including clutch means rotatably associated with the rotational-direction determining mechanism. The rotational-direction determining mechanism comprises a planetary gear system, whereof the planet carrier is adapted to be locked to effect rotation of the screw-driving member in a screw-extraction sense (i.e. reverse rotation) or to be released to effect rotation of the screw-driving member in a screw-insertion sense (i.e. forwards rotation).

REFERENCES:
patent: 2893278 (1959-07-01), Rice
patent: 3983759 (1976-10-01), Linden
patent: 4231270 (1980-11-01), Totsu
patent: 4237946 (1980-12-01), Leitner
patent: 4262501 (1981-04-01), Vaughn et al.

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